qrun: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/qrun - from package: torque-client

You may install the required package with command yum install {package}

Error in other languages:
qrun: bevel nie gevind nie
qrun: comandă negăsită
qrun: comando não encontrado
qrun: commande introuvable
qrun: command not found
qrun: käsku ei ole
qrun: không tìm thấy lệnh
qrun: komanda nerasta
qrun: Kommando nicht gefunden.
qrun: kommandot finns inte
qrun: komut yok
qrun: nie znaleziono polecenia
qrun: níor aimsíodh an t-ordú
qrun: no se encontró la orden
qrun: no s'ha trobat l'ordre
qrun: opdracht niet gevonden
qrun: parancs nem található
qrun: perintah tidak ditemukan
qrun: príkaz nenájdený
qrun: příkaz nenalezen
qrun: команда не найдена
qrun: командата не е открита
qrun: 命令找不到
qrun: コマンドが見つかりません